People should be allowed to have as many children as they like, and the surplus population should be sent to other worlds, to spread mankind so far across the galaxy that no disaster, no invasion could ever threaten the human race with annihilation.

"It means," said Graff, "that ships could talk to each other even when they’re across the galaxy.

There are no more uses of "galaxy" in the book.

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The Star Wars story is said to have taken place in a galaxy far, far away.

I mean, here we are on the run and everything, we must have the police of half the Galaxy after us by now, and we stop to pick up hitchhikers.